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Carburetor/Fuel-injection throttle body sychronizer
Accuracy: 0.5cmHg;
Displays the difference in vacuum intake settings of two carburetors or throttle bodies on a single nine LED display
Green LED at center indicates whether manifold vacuums are equal.
"Zero" adjustment knob for quick pre-calibration prior to synchronizing.
Carburetor/Fuel-injection throttle body sychronizer